Simple Fixes For Bad Battery Connections

Simple Fixes For Bad Battery Connections

Sometimes the obvious cause of a vehicle complaint isn’t the right one. Your diagnostic skills are key.

In this article originally published in our sister publication Transmission Digest, author Mike Greer outlines what can go wrong with a car’s starting or electrical system. It’s simple, says Greer, “starting with the battery and ending with, well, the battery.” According to the author, seemingly every week, his shop gets a vehicle in that has an issue at the battery terminals; and if it isn’t causing an issue right now, it will sooner or later.

Greer highlights several cars, including a 2009 Honda Civic, a 2014 Honda Pilot and a 1999 Toyota 4Runner that all apparent transmission problems that turned out to be battery-related issues.

Whether or not you work on imports, proper diagnostic procedures can save the day. Many times, it’s a simple fix.

RR-Tech-June-Figure-1
Figure 1.

This article was contributed by Mike Greer, who has been with Certified Transmission since 1996 and been in the industry since 1987. He is an ASE master technician and has served as a master builder for the company in the past. 

You May Also Like

Rough Running GM Vehicle

This condition may be caused by an internal circuit board fault within the throttle body.

Rough Running, Reduced Engine Power, Service Engine Soon (SES) Light On, P0123 AND P0222

2020-2021 Chevrolet Silverado 2500/3500 w/6.6L 

L8T engine

2020-2021 GMC Sierra 2500/3500 w/6.6L L8T engine

Using a Scope

Ignition coil and plug diagnostics.

Scope-diagnostics
Diagnostic Procedures For Stop/Start Systems

Stop/start technology is more than just a switch wired to the brake pedal and starter.

Auxiliary Cooling Pumps

An auxiliary cooling pump’s primary function is to circulate warm coolant to the heater core.

Battery Management Means Knowing How It Ages

The battery may be fully charged, but you also need to measure how low the voltages go while the engine is cranking.

Other Posts
GM No Crank After Auto-Stop Event

These concerns could be caused by a broken or loose engine ground cable/strap, which grounds the engine to the body.

Caring For AGM And Flooded Car Batteries

Faulty battery cables, if loose, corroded, or damaged, can lead to power drainage.

Alternator Testing For No Charge Conditions

Many alternator problems turn out to be nothing more than a bad connection at the alternator or a bad wiring harness.

Detecting Misfire And Knock Conditions

Knock sensors are mounted on the block near the base of the cylinder head.